1929 is not nine, 3949 frozen dog, 5969 open the door and talk.

This is a folk proverb about nine days. To show the process of getting colder and warmer.

Solstice of winter. Experts said that as an important node of the 24 solar terms in China, the winter solstice is called "the winter solstice is as big as a year", which also means entering a "cold day".

On the solstice after beginning of winter, "counting nine", commonly known as "crossing nine", means entering the coldest season of the year. The so-called "number nine" means that from the date of the "winter solstice", nine days is a unit, which is called "nine". After nine "nines", it is exactly 8 1 day, which is called "nine". From "September 19th" to "September 9th", the cold winter turned into a warm spring.

Astronomical experts said that the widely circulated "99-99 Xiehan Song", commonly known as "99-99 Song", vividly recorded the climate and phenological changes between the winter solstice and the vernal equinox, and also expressed some laws of agricultural activities.

Extended data:

It is generally considered to be a folk solar term in China, also called "Winter 99". It is called "Jiudu" from the winter solstice, and then it is called "Jiudu" every nine days. Waiting for nine "nines" adds up to 8 1 day, which is called "out of nine" and is the spring season.

When the custom of counting nine originated, there is no accurate statement so far. But according to ancient records, it existed at least in the Southern and Northern Dynasties. There is a passage in the Chronicle of Jingchu written by Zonggu in the Liang Dynasty: "The winter solstice is 998 1 day, and the cold ends."

People's Network-Looking at willow trees along the river in May, 969 ... What do you know about the number nine?

People's Daily Online-There are as many years as there are winter solstice.